from The Conversation
– this post authored by Stephen Kershaw, Brunel University London
The asteroid thought to have killed the dinosaurs smashed into the Earth with a billion times more energy than the atomic bombs dropped on Hiroshima and Nagasaki. Many believe the impact caused a mass extinction, wiping out the dinosaurs on land and numerous lifeforms in the oceans. But one of the difficulties in knowing exactly whether and how this happened is that the Chicxulub crater left by the asteroid is buried below a thick layer of sedimentary rock.